Bundle-sheath leakiness and intrinsic water use efficiency of a perennial C<sub>4</sub>grass are increased at high vapour pressure deficit during growth

Gong, Xiao Ying; Schäufele, Rudi; Schnyder, H.

doi:10.1093/jxb/erw417

Cited by 25 publications

(40 citation statements)

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“…Positive effects of nitrogen fertilization and low VPD on leaf elongation are well established (MacAdam et al 1989; Gastal and Nelson 1994; Ben Haj Salah and Tardieu 1996; Vos and van der Putten 1998; Tardieu et al 2000; Kavanová et al 2008). Although high VPD clearly increased the leaf-level transpiration rate and decreased stomatal conductance in the same experiment (Gong et al 2016), the non-significant VPD effects on phytomer growth parameters may be due to the non-limiting water supply in our experiment, i.e. the supplementation of nutrient solution with a frequency of three times per day.…”

Section: Discussionmentioning

confidence: 54%

Effects of nitrogen and vapour pressure deficit on phytomer growth and development in a C4 grass

et al. 2015

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The morphology of almost all grasses can be conceptualized as a hierarchical arrangement of subunits, termed phytomers. Therefore, knowledge of phytomer growth and development serves as a basis to elucidate the rhythm of grass growth. This study provides systematic analyses on the process of phytomer development of C. squarrosa, a perennial C4 grass. The invariant coordination of elongation within and between phytomers was a stable developmental feature across treatments, thus the quantitative coordination rules are applicable for predicting morphological development of C. squarrosa under contrasting levels of nitrogen nutrition or vapour pressure deficit.

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Section: Discussionmentioning

confidence: 54%

Effects of nitrogen and vapour pressure deficit on phytomer growth and development in a C4 grass

et al. 2015

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“…Because of carbon isotope discrimination during gas exchange of plants in light (Gong et al . ), the δ 13 C CO2 increased to −5.3 ± 0.2‰ (mean ± SD) inside the growth chambers with the 13 C‐enriched CO 2 and −47.7 ± 0.1‰ in the chambers with the 13 C‐depleted CO 2 . The two CO 2 sources also differed in δ 18 O CO2 (Supporting Information Table S1), but this did not affect the δ 18 O of cellulose in C. squarrosa (Liu et al .…”

Section: Methodsmentioning

confidence: 87%

“…a), similar to the VPD effect on photosynthetic 13 C discrimination of young mature leaves reported by Gong et al . (). Furthermore, the carbon isotope fractionation between cellulose and net fixed CO 2 did not differ between low and high VPD: on average cellulose was 3.0‰ depleted in 13 C relative to net fixed CO 2 ( P > 0.05, Fig.…”

Section: Resultsmentioning

confidence: 97%

“…Carbon isotope discrimination of leaf blade cellulose (∆ 13 C Cel , ‰) (a), carbon isotope fractionation between net fixed CO 2 (∆ 13 C A , obtained from online 13 C discrimination measurements by Gong et al . ) and cellulose, ∆ 13 C A − ∆ 13 C Cel (b), oxygen isotope enrichment of leaf water in the upper part of the canopy obtained by pooling leaf ages 2 to 6 (∆ 18 O LW , ‰) (c), oxygen isotope enrichment of leaf cellulose relative to source water (∆ 18 O Cel , ‰) under low (empty bar) and high (grey bar) VPD (d). Values represent mean ± standard error ( n = 6).…”

Section: Resultsmentioning

confidence: 99%

“…Gong et al . ; Liu et al . ) of the 13 C/ 12 C– 18 O/ 16 O–CO 2 gas exchange mesocosms described by Schnyder et al .…”

Section: Methodsmentioning

confidence: 99%

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An oxygen isotope chronometer for cellulose deposition: the successive leaves formed by tillers of a C₄ perennial grass

Liu

Yang

Gong

et al. 2017

Plant Cell & Environment

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Multiannual time series of (palaeo)hydrological information can be reconstructed from the oxygen isotope composition of cellulose (δ O ) in biological archives, for example, tree rings, but our ability to temporally resolve information at subannual scale is limited. We capitalized on the short and predictable leaf appearance interval (2.4 d) of a perennial C grass (Cleistogenes squarrosa), to assess its potential for providing highly time-resolved δ O records of vapour pressure deficit (VPD). Plants grown at low (0.63 kPa) or high (1.58 kPa) VPD were swapped between VPD environments and exposed to the new environment for 7 d with simultaneous CO labelling. Then, leaves were sampled by age/position along individual tillers. Five leaves at different developmental stages were growing simultaneously. The period of most-active leaf elongation, from 10 to 90% of final length, lasted 6.6 d, and ~80% of all carbon and oxygen incorporation in whole-leaf cellulose occurred within 7 d. Cellulose deposition stopped at (or shortly after) full leaf expansion. The direction of change, low-to-high or high-to-low VPD, had no differential effect on new oxygen and carbon incorporation in cellulose. Successive leaves produced by tillers of C. squarrosa provide a δ O record useful for reconstructions of short-term hydrological dynamics.

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Climate and anthropogenic drivers of changes in abundance of C4 annuals and perennials in grasslands on the Mongolian Plateau

et al. 2022

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Background C4 plants have increased substantially during the past several decades in the grasslands of the Mongolian Plateau due to regional warming. Here, we explore how the patterns of abundances of C4 annuals and C4 perennials change over space and time. Methods A total of 280 sites with C4 plants were surveyed in four types of grasslands in 9 years. The relative biomasses of C4 plants (PC4), C4 annuals (PA4), and C4 perennials (PP4) were calculated. Structural equation modeling was used to analyze the drivers of changes in PA4 and PP4. Results At the regional scale, PA4 on average was 11% (±19%, SD) and PP4 was 13% (±19%, SD). Spatially, C4 annuals dominated the C4 communities within an east–west belt region along 44° N and tended to spread toward northern latitudes (about 0.5°) and higher altitudes in the east mountainous areas. The abundance of C4 annuals decreased, while that of C4 perennials increased. The patterns of C4 annuals and C4 perennials were mainly controlled by temperature, growing season precipitation, and dynamics between the two life forms. Conclusions C4 annuals exhibited competitive advantages in normal and wet years, while C4 perennials had competitive advantages in dry years. Grazing as a main human disturbance increased C4 annuals, but had no significant effect on C4 perennials.

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Bundle-sheath leakiness and intrinsic water use efficiency of a perennial C₄grass are increased at high vapour pressure deficit during growth

Abstract: Bundle-sheath leakiness of a perennial C4 grass responds dynamically to short-term variation of atmospheric CO2 concentration, and is altered by long-term changes of vapour pressure deficit.

Cited by 25 publications

References 51 publications

Effects of nitrogen and vapour pressure deficit on phytomer growth and development in a C4 grass

Effects of nitrogen and vapour pressure deficit on phytomer growth and development in a C4 grass

An oxygen isotope chronometer for cellulose deposition: the successive leaves formed by tillers of a C₄ perennial grass

Climate and anthropogenic drivers of changes in abundance of C4 annuals and perennials in grasslands on the Mongolian Plateau

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Bundle-sheath leakiness and intrinsic water use efficiency of a perennial C4grass are increased at high vapour pressure deficit during growth

Abstract: Bundle-sheath leakiness of a perennial C4 grass responds dynamically to short-term variation of atmospheric CO2 concentration, and is altered by long-term changes of vapour pressure deficit.

Cited by 25 publications

References 51 publications

Effects of nitrogen and vapour pressure deficit on phytomer growth and development in a C4 grass

Effects of nitrogen and vapour pressure deficit on phytomer growth and development in a C4 grass

An oxygen isotope chronometer for cellulose deposition: the successive leaves formed by tillers of a C4 perennial grass

Climate and anthropogenic drivers of changes in abundance of C4 annuals and perennials in grasslands on the Mongolian Plateau

Contact Info

Product

Resources

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Bundle-sheath leakiness and intrinsic water use efficiency of a perennial C₄grass are increased at high vapour pressure deficit during growth

An oxygen isotope chronometer for cellulose deposition: the successive leaves formed by tillers of a C₄ perennial grass